Table 4 MDC, MCS and ROC values for neck pain and referred pain only in patients with referred pain at baseline, and differences depending on baseline pain severity and chronicity
Measurement of change | Value (all 487 patients with referred pain at baseline) | Baseline pain severity (PI-NRS) | Chronicity | ||
|---|---|---|---|---|---|
Lowest tertile* (< 6 points) | Highest tertile* (≥ 8 points) | Subacute (<90 days) | Chronic (≥ 90 days) | ||
Neck pain (PI-NRS) | |||||
MDC; Value (95% CI)** | 4.2 (3.4–5.5) | ||||
n | 34 | 11 | 19 | 6 | 28 |
MCS (SD) | 4.1 (2.3) | 2.5 (1.2) | 4.8 (2.4) | 4.1 (2.4) | 4.1 (2.3) |
n | 306 | 61 | 167 | 120 | 182 |
ROC curve | |||||
Area (IC 95%) | 0.91 (0.86–0.97) | 0.92 (0.80–1.00) | 0.93 (0.88–0.99) | 1.00 (0.99–1.00) | 0.89 (0.82–0.96) |
Sensitivity | 0.93 | 0.88 | 0.87 | 0.99 | 0.93 |
Specificity | 0.81 | 0.91 | 0.86 | 1.00 | 0.77 |
ROC | 1.5 | 1.5 | 2.5 | 0.5 | 1.5 |
N | 485 | 114 | 249 | 202 | 279 |
Pain referred to the arm (PI-NRS) | |||||
MDC; Value (95% CI)** | 6.2 (5.0–8.2) | ||||
n | 35 | 11 | 19 | 7 | 30 |
MCS (SD) | 4.1 (2.7) | 2.4 (1.7) | 5.3 (3.0) | 3.7 (3.4) | 3.6 (3.2) |
n | 304 | 96 | 127 | 127 | 193 |
ROC curve | |||||
Area (IC 95%) | 0.81 (0.73–0.89) | 0.80 (0.65–0.95) | 0.86 (0.76–0.96) | 0.89 (0.78–1.00) | 0.76 (0.68–0.85) |
Sensitivity | 0.87 | 0.79 | 0.87 | 0.90 | 0.81 |
Specificity | 0.71 | 0.82 | 0.77 | 0.86 | 0.71 |
ROC | 1.5 | 1.5 | 2.5 | 0.5 | 1.5 |
N | 479 | 159 | 201 | 214 | 293 |